JP2014168267A - Communication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce waste in a reception operation and a transmission operation in the case that retransmission may occur except a predetermined cycle by retransmission control.SOLUTION: A communication device performing a reception process of data transmitted at each timing arrived at a predetermined cycle, comprises: a transmission section for transmitting a signal indicating that the data is received normally in the case that the data transmitted at M-th timing according to the predetermined cycle is received normally; and a control section for performing control for providing at least a period where other reception process different from the reception process is performed or a period where no reception process is performed, from time when transmission is performed to time when next (M+1)-th timing according to the predetermined cycle arrives.

Description

  The present invention relates to a communication device (transmitting device, receiving device) for transmitting / receiving a radio signal, a transmission method, and a receiving method. The present invention is applied to, for example, a case in which retransmission control is performed such that data transmitted from a transmission device to the reception device is not normally received by the reception device, and retransmission is performed from the transmission device. Is preferred.

  In a radio communication system such as a mobile communication system, a radio signal is transmitted from a transmission device to a reception device. Examples of the radio signal include packet data. There are various types of data stored in the data portion of the packet data, and not only text data and image data but also audio data may be stored. When continuous transmission is not performed, transmission of a radio signal is generally performed at a predetermined cycle, for example, transmission is performed at a cycle of 20 ms.

  However, although a radio signal is transmitted from the transmission device, there is no guarantee that the reception device can normally receive the radio signal. That is, since transmission / reception is performed using a wireless line, the transmission signal is affected by a propagation path (for example, fading), and an error may occur in the reception signal obtained by the reception device receiving the transmission signal. is there. Of course, by performing error correction coding on the transmission signal, error correction decoding can be performed in the receiving apparatus to correct the error, and normal reception data can be generated. However, depending on the degree of error, the error cannot be completely corrected and normal received data may not be obtained.

  In consideration of such a situation, there is a technique for performing retransmission from the transmission device by determining the reception result of the transmission signal in the reception device and feeding back the reception result to the transmission device.

  FIG. 1 shows a conventional data transmission / reception processing method when retransmission control is introduced.

  As shown in the figure, the transmission device transmits data (for example, voice packet data) one after another at a cycle of 20 ms, and the reception device attempts to receive the transmitted data. Then, if the receiving apparatus can receive normally, the receiving apparatus transmits an ACK signal. When the transmission device receives the ACK signal, the transmission device recognizes that the transmission has been normally performed, and transmits another transmission signal (for example, the next transmission signal addressed to the same reception device) at the next transmission timing. However, as shown in the figure, the third transmission results in an error due to the influence of the radio channel, and when the receiving apparatus cannot receive normally, the receiving apparatus transmits a NACK signal. When the transmitting apparatus receives the NACK signal, the transmitting apparatus recognizes that the transmission has not been normally performed and executes retransmission, and the receiving apparatus further receives the retransmitted data. If the retransmission is successfully received, an ACK signal is transmitted from the receiving device, and the next data is transmitted at the next transmission timing. In this way, by introducing retransmission control, even if initial transmission fails, transmission can be successful by one or more retransmissions.

Non-Patent Documents 1 to 3 are known for the retransmission control described above.
3GPP TS25.212 3GPP TS25.321 3GPP TS36.212

  As described above, introduction of retransmission control increases the chances of successful data transmission from the transmission device to the reception device. However, since retransmission control is performed, intermittent reception is simply performed at a predetermined cycle. Such control cannot be performed.

  Therefore, one of the objects of the present invention is to reduce the waste of reception operation and transmission operation when retransmission outside the predetermined period can occur due to retransmission control.

  In addition, the present invention is not limited to the above object, and other effects of the present invention can be obtained by the respective configurations shown in the best mode for carrying out the invention described below, and cannot be obtained by conventional techniques. It can be positioned as one of

  In the present invention, in a communication apparatus that performs reception processing of data transmitted at each timing that arrives at a predetermined cycle in a predetermined reception period at each timing, data is normally received when data can be received normally. A transmission unit for transmitting a signal indicating that the data has been received; a reception processing unit for extending a reception period for performing data reception processing when data is received; and no data transmission notice at the M-th timing according to the predetermined cycle When the data transmitted in (1) is received during the reception period, the reception period is extended, and when the data is received normally, a signal indicating that the data has been received normally is transmitted to extend the reception period. It is determined whether or not retransmission control processing has been performed based on a data transmission advance notice received during the reception period, and if the data retransmission control processing has been performed, Using the communication device characterized by comprising a control unit that performs control of transmitting a signal indicating that the received normally the data.

  According to the present invention, it is possible to reduce waste of reception operation and transmission operation when retransmission outside the predetermined period can occur due to retransmission control.

  Embodiments of the present invention will be described below.

[A] Description of First Embodiment When a radio signal is transmitted from a transmission device at a predetermined cycle, the reception device can receive the radio signal by performing reception in accordance with the cycle. Whether or not transmission (retransmission) is performed outside the period can be determined by the receiving apparatus according to the type of signal transmitted by itself. That is, when an ACK signal is transmitted, transmission (retransmission) outside the cycle does not occur, and when an NACK signal is transmitted, transmission (retransmission) occurs outside the cycle.

  Therefore, in this embodiment, when a NACK signal is transmitted in a receiving apparatus that performs intermittent reception control in accordance with a transmission cycle, a reception operation period by intermittent reception control is set longer than when an ACK signal is transmitted. I will do it. As an example of the length to be set, for example, it can be a period until a wireless signal transmitted by retransmission (for example, first retransmission) is received. Of course, when a NACK signal is further transmitted in response to the retransmission, it can be a period until a further retransmission (second retransmission) is received.

  When transmitting a NACK signal, the power of the receiving unit is turned on for the time corresponding to the transmission cycle. When transmitting an ACK signal, the power of the receiving unit is turned off by completing the reception. Can also be reduced.

  However, in a situation where the reception environment for transmitting the NACK signal is assumed to be unfavorable, the reception unit receives a retransmission during a period of 1/2 to 2/3 or more of the transmission cycle. The remaining period of 1/3 to 1/2 can also be allocated to the measurement (search) period of the reception quality of signals from neighboring base stations. That is, the reception processing unit can be controlled to perform other reception processing.

  FIG. 2 shows a first example of transmission / reception processing.

  As shown in the figure, the transmission device transmits data (for example, voice packet data) with a period of 20 ms as an example, and the reception device performs intermittent reception in accordance with the cycle. When data can be received normally and an ACK signal is transmitted, a predetermined period (T1) is assigned to the reception operation for data reception, and when a NACK signal is transmitted, the reception operation for data reception is performed. A predetermined period (T2 (T1 <T2)) is allocated. T2 is a period during which at least one retransmission can be received. When retransmission is performed a plurality of times, the period T2 may be set to TL so that the last retransmission is received.

  Further, as a second example, there is a case where the transmitting apparatus cannot receive the NACK signal even though the NACK signal is transmitted. In such a case, since retransmission is not performed, a further NACK signal can be transmitted to expect further retransmission, but it takes a considerable amount of time.

  Therefore, if the receiving apparatus does not normally receive the retransmission even if it transmits the NACK signal (or if it does not receive the advance notice (preliminary notice) of performing the retransmission), the receiving apparatus transmits the next periodic transmission. It is also possible to perform control so that no receiving unit is assigned for the data receiving operation until the timing comes. That is, for example, the power supply of the receiving unit can be turned off or assigned to the search period.

  FIG. 3 shows a second example of transmission / reception processing.

  As shown in the figure, a receiving apparatus that has not successfully received the first transmission signal transmits a NACK signal and attempts to receive a retransmission, but does not receive a retransmission (or performs a retransmission). Since the advance notification has not been received), the receiving unit is thereafter released from the standby state for receiving retransmission data. On the other hand, since the third transmission signal is not normally received, the receiving apparatus transmits a NACK signal to the transmitting apparatus. Here, since the transmitting apparatus has received the NACK signal, it performs retransmission. Since the receiving apparatus has received the first retransmission, the receiving apparatus transmits an ACK signal, and then releases the receiving unit from the retransmission data reception standby state. The operation at the time of opening may be the same as in the first example.

  The above is the basic control flow of the first example and the second example in the first embodiment. The configuration of the receiving apparatus corresponding to such control will be described with reference to FIG.

  FIG. 4 shows an example of the configuration of the receiving apparatus.

  1 is a reception antenna, 2 is a reception processing unit, 3 is a reception result determination device, 4 is a reception control device, 5 is a timer, 6 is an ACK / NACK signal generation device, 7 is a transmission processing unit, and 8 is a transmission antenna. .

  The reception antenna 1 receives a periodic transmission signal transmitted from the transmission device and a transmission signal to be retransmitted. The signal received by the reception antenna is obtained by the reception processing unit 2 by performing reception processing according to the transmission format applied at the time of transmission, and demodulating and decoding received data (which may include error correction decoding). The transmission format can be included in a transmission notice transmitted from the transmission apparatus, or can be estimated to be a predetermined format. The reception data obtained by the reception processing unit 2 is given to the reception result determination device 3 to determine whether the reception has been normally performed. For example, when the transmission apparatus performs error detection encoding processing (addition of CRC calculation result, etc.) on transmission data, error detection is performed using the transmission data, and the result is given to the ACK / NACK signal generation apparatus 6. In the case of normal reception, the received data is given to a reception data processing unit (not shown) on the left side, displayed on the display as needed, output from a speaker as sound, or output to an external device. Or If the data could not be received normally, the data can be discarded. However, the data can be stored in the storage unit inside the reception result determination device, and can be combined with the received data by the next retransmission. Also good. And a reception process part is good also as decoding based on the data after a synthesis | combination, and giving the result to the reception determination apparatus 3 (what is called a hybrid ARQ system).

  The ACK / NACK signal generation unit 6 that has acquired the reception result outputs an ACK signal when the reception result indicates that the reception was successful, and NACK when the reception result indicates that the reception was not successful. Output a signal. The transmission device performs a transmission process on the response signal (ACK signal, NACK signal) to generate a radio signal, and transmits it from the transmission antenna 8. The transmission timing of the response signal can be after a predetermined offset time has elapsed from the transmission timing of the packet.

  Note that the transmitting antenna and the receiving antenna can be shared antennas using a duplexer or the like.

  The reception control device 4 controls each receiving unit based on the timing signal from the timer 5. The other units are controlled by the control unit 9.

  FIG. 5 shows an example of a control flow in the receiving apparatus. This control is mainly executed by the control of the reception control device 4.

  The reception control device 4 performs control so as to start the reception operation, and determines whether or not a packet has been received (S1).

  Here, when received, the reception result determination apparatus 3 determines whether or not the received packet has been correctly received (S2).

  If the signal is correctly received, an ACK signal is generated by the ACK / NACK signal generator 6 and transmitted from the transmission processing unit 7 and the transmission antenna 8 (S3).

  On the other hand, if the signal cannot be correctly received, an NACK signal is generated by the ACK / NACK signal generation device 6 and transmitted from the transmission processing unit 7 and the transmission antenna 8 (S5), and the reception control device 4 receives the retransmission packet. In order to perform the reception, the reception processing unit 2 or the like is set in a standby state without turning off the power. Thereafter, the process returns to S1.

  When the ACK signal is transmitted in S3, packet data reception stop processing is performed (S4). Examples of the reception stop process include turning off the power of the reception processing unit or the like, or assigning it to the search period.

  Thereafter, the reception control device 4 controls the reception processing unit 2 and the like in accordance with the next transmission timing, receives the next packet, and returns to the determination S1.

  If the packet is not received at the transmission timing of the predetermined cycle in the determination of S1, the packet is retransmitted without turning off the power of the reception processing unit 2 in the same manner as after transmitting the NACK signal in anticipation of retransmission. Reception determination is performed (S1).

  FIG. 6 shows another example of the control flow in the receiving apparatus. This control is executed by the control of the reception control device or the like.

  The reception control device 4 performs control so as to start the reception operation in accordance with the transmission timing, and determines whether or not a packet has been received (S1).

  Here, when a packet is received, the reception result determination apparatus 3 determines whether the received packet has been correctly received (S2).

  If the signal is correctly received, an ACK signal is generated by the ACK / NACK signal generator 6 and transmitted from the transmission processing unit 7 and the transmission antenna 8 (S3).

  On the other hand, if the signal cannot be correctly received, an NACK signal is generated by the ACK / NACK signal generation device 6 and transmitted from the transmission processing unit 7 and the transmission antenna 8 (S5), and the reception control device 4 receives the retransmission packet. In order to perform the reception, the reception processing unit 2 or the like is set in a standby state without turning off the power. Thereafter, the process returns to S1.

  When no packet is received in S1 and when an ACK signal is transmitted in S3, packet data reception stop processing is performed (S4). Examples of the reception stop process include turning off the power of the reception processing unit or the like, or assigning it to the search period.

Thereafter, the reception control device 4 controls the reception processing unit 2 and the like in accordance with the next transmission timing to receive the next packet, and performs the determination S1.
[B] Description of Second Embodiment In the retransmission control, the transmission apparatus can perform the retransmission control not only when the NACK signal is not received but also when the ACK signal is not received.

  FIG. 7 shows retransmission control when the transmission apparatus does not receive an ACK signal.

  As in the first embodiment, the transmission device transmits packets at a predetermined period (20 ms). The first transmission was successful and the receiving device transmitted an ACK signal, but the transmitting device could not normally receive the ACK signal (or misjudged the ACK signal as a NACK signal). Therefore, the transmission apparatus executes retransmission.

  On the other hand, since the receiving apparatus transmits the ACK signal, the receiving apparatus does not expect the retransmission, and does not receive the retransmission. Accordingly, since the receiving apparatus does not transmit a response signal (ACK, NACK signal) in response to retransmission, the transmitting apparatus further performs retransmission. Thereafter, useless retransmissions are transmitted until the maximum number of retransmissions is reached until the next transmission timing.

  Therefore, in this embodiment, when the transmission apparatus performs the first retransmission, when the NACK signal is not received, the transmission apparatus does not perform the next retransmission. That is, for the first transmission, retransmission is performed not only when the NACK signal is received but also when the ACK signal is not received. After the first retransmission, the retransmission is performed when the NACK signal is received. When the ACK signal is not received, retransmission is not performed.

  As a result, it is possible to suppress unnecessary retransmission performed when the transmission apparatus cannot detect the ACK signal.

  FIG. 8 shows an example of the configuration of the transmission apparatus.

  Reference numeral 11 denotes a reception antenna, 12 denotes a reception processing unit, 13 denotes a retransmission control device, 14 denotes a packet generation device, 15 denotes a packet information generation device, 16 denotes a transmission processing unit, and 17 denotes a transmission antenna.

  The receiving antenna 11 receives various signals (for example, ACK signal and NACK signal) transmitted from the receiving device. A signal received by the reception antenna is obtained by the reception processing unit 12 by performing reception processing corresponding to the transmission format applied at the time of transmission, and demodulating and decoding received data (which may include error correction decoding). Received data (for example, ACK signal, NACK signal) obtained by the reception processing unit 12 is given to the retransmission control device 13.

  The retransmission control device 13 performs a new transmission (transmission performed every predetermined period) and then does not receive an ACK signal at a scheduled reception timing of a response signal (ACK signal, NACK signal) (receives a NACK signal) In some cases, retransmission control is executed.

  That is, retransmission data is generated based on transmission data stored in the packet generation device 14 and transmitted via the transmission processing unit 16 and the transmission antenna 17.

  In this example, information on the format of a packet to be transmitted from the packet generation device 14 is given to the packet information generation device 14, and transmission parameters (information such as packet size, encoding method, modulation method, MIMO application / non-application, etc.) ) Is generated by the packet information generation device 15 and transmitted through the transmission processing unit 16 and the antenna 17 as advance notice information (including notification of transmission to a specific reception device) prior to transmission of the packet. .

  When changing the modulation method according to the transmission parameter, the transmission processing unit 16 is notified of the modulation method, and the transmission processing unit 16 transmits the packet using the notified modulation method.

  Note that the transmitting antenna and the receiving antenna can be shared antennas using a duplexer or the like.

  Here, the retransmission control unit 13 performs retransmission when the ACK signal is not received (including the case where the NACK signal is received) for the first transmission (new transmission), but after the Nth time (including the Nth time). Regarding retransmission, retransmission is not performed unless a NACK signal is received. Here, N may be a predetermined value of 2 or more. However, N is a number smaller than the maximum number of retransmissions (maximum number of retransmissions −1 etc.).

  FIG. 9 shows a first example of this transmission / reception processing.

  As shown in the figure, the transmission of the first (new) packet data was successful and the receiving apparatus transmitted the ACK signal, but the transmitting apparatus could not detect the ACK signal (at the reception timing of the predetermined response signal) or When the NACK signal is received, the retransmission control device 13 performs retransmission control.

  However, since the receiving apparatus transmits the ACK signal, the receiving operation of the retransmission packet is not performed (the reception processing unit is powered off or searched), and the response signal is not transmitted.

  Therefore, the transmission apparatus receives neither an ACK signal nor a NACK signal at the reception timing of the response signal for retransmission. When the NACK signal is not received as described above, the retransmission control device 13 of the transmission device controls not to perform retransmission.

  FIG. 10 shows an example of a control flow in the transmission apparatus. This control is executed mainly by the control of the retransmission control device 13.

  The transmission device (retransmission control device 13) determines whether there is a transmission packet to be transmitted (S1).

  Here, if it is determined that there is no packet, the process returns to S1. If it is determined that there is a packet, the packet generation apparatus sends the transmission packet to the transmission processing unit 16 and transmits it from the transmission antenna 17 so as to transmit a new packet (S2). Prior to the transmission of the packet, transmission parameter information is generated by the packet information generation device 15 for the reception device, and similarly transmitted via the transmission processing unit 17 and the transmission antenna 17.

  Then, the retransmission control device 13 sets the set value i of the transmission counter to 0 (S3). The counter is provided in the retransmission control device 13.

  Next, the retransmission control device 13 determines whether or not a response signal has been received. If an ACK signal is received, the retransmission control device 13 returns to S1 and determines the presence or absence of the next transmission packet.

  On the other hand, if the response signal is a NACK signal, the retransmission control device 13 performs control so as to transmit a retransmission packet (S5), increments the set value i of the counter by 1, and returns to the determination of S4.

  If it is determined in S4 that neither an ACK signal nor a NACK signal can be detected as a response signal, it is determined as DTX (no response), and it is determined whether the counter value i is greater than a predetermined value k (S6). For example, k is a natural number of 2 or more and is smaller than the maximum number of retransmissions.

  If the set value of the counter is larger than k in S6, the retransmission control device 13 does not proceed to the retransmission process, returns to S1, and transmits the next packet.

  On the other hand, if the set value of the counter is equal to or less than k in S6, a retransmission packet is transmitted (S5), the counter value i is incremented by 1, and the process returns to S4.

  In this way, even if there is a difference in recognition of the reception result between the transmission device and the reception device, the number of unnecessary retransmissions can be reduced.

  Next, FIG. 11 shows a second example of this transmission / reception processing.

  As shown in the figure, the transmission of the first (new) packet data was successful and the receiving apparatus transmitted the ACK signal, but the transmitting apparatus could not detect the ACK signal (at the reception timing of the predetermined response signal) or When the NACK signal is received, the retransmission control device 13 performs retransmission control.

  The receiving apparatus transmits an ACK signal, but also determines whether or not a retransmission packet is transmitted on the assumption that the transmitting apparatus may not be able to detect the ACK signal. At this time, the packet information generation device 15 can determine whether or not there is a transmission advance notice, and can also determine by trying to receive an actual packet.

  When the receiving apparatus detects that retransmission is not performed, the receiving apparatus turns off the power of the receiving unit or assigns it to the search period.

  On the other hand, when the receiving apparatus detects that the retransmission process has been performed despite the transmission of the ACK signal, the receiving apparatus transmits the ACK signal regardless of whether the retransmission packet can be normally received or not. This is because normal reception has already been completed and no further retransmission is required.

  Accordingly, when the ACK signal is received by the transmission apparatus, the retransmission control apparatus 13 of the transmission apparatus performs control so as not to perform further retransmission.

  FIG. 12 shows an example of a control flow in the receiving apparatus. This control is mainly executed by the control of the reception control device 4. That is, the receiving apparatus having the configuration shown in FIG. 4 may be used.

  The transmission / reception device (reception control device 4) performs control so as to start the reception operation in accordance with the transmission timing of a new packet having a predetermined cycle, and determines whether or not a packet has been received (S1).

  Here, when received, the reception result determination apparatus 3 determines whether or not the received packet has been correctly received (S2).

  If the signal is correctly received, an ACK signal is generated by the ACK / NACK signal generator 6 and transmitted from the transmission processing unit 7 and the transmission antenna 8 (S3).

  On the other hand, if the signal cannot be correctly received, an NACK signal is generated by the ACK / NACK signal generation device 6 and transmitted from the transmission processing unit 7 and the transmission antenna 8 (S6), and the reception control device 4 receives the retransmission packet. In order to perform the reception, the reception processing unit 2 or the like is set in a standby state without turning off the power. Thereafter, the process returns to S1.

  When the ACK signal is transmitted in S3, the reception control device 4 determines whether or not a retransmission packet has been received (S4). Here, when the retransmission packet transmission processing is not performed (when the transmission notice is not received or when the retransmission packet is not actually received), packet data reception stop processing is performed (S5). Examples of the reception stop process include turning off the power of the reception processing unit or the like, or assigning it to the search period.

  Thereafter, the reception control device 4 controls the reception processing unit 2 and the like in accordance with the next transmission timing, receives the next packet, and returns to the determination S1.

  If it is detected that the retransmission packet transmission processing has been performed despite the transmission of the ACK signal in S4, the transmission apparatus performs further retransmission by returning to S3 and transmitting the ACK signal. It suppresses it.

  Note that the route from S4 to S3 can be limited to one time, or the route may be allowed to be followed until a predetermined value N is reached. The predetermined value N is a value equal to or less than the maximum number of retransmissions -1.

Conventional data transmission / reception processing method First example of transmission / reception processing Second example of transmission / reception processing Example of receiver configuration Example of control flow in receiver Another example of control flow in receiver Retransmission control when transmitter does not receive ACK signal An example of the configuration of the transmitter First example of transmission processing An example of control flow in the transmitter Second example of transceiver Example of control flow in receiver

DESCRIPTION OF SYMBOLS 1 Reception antenna 2 Reception processing part 3 Reception result determination apparatus 4 Reception control apparatus 5 Timer 6 ACK, NACK signal generation apparatus 7 Transmission processing part 8 Transmission antenna 9 Control part 11 Reception antenna 12 Reception processing part 13 Retransmission control apparatus 14 Packet generation apparatus 15 packet information generator 16 transmission processing unit 17 transmitting antenna

Claims (4)

In a communication apparatus that performs reception processing of data transmitted at each timing that arrives at a predetermined cycle in a predetermined reception period at each timing,
When the data can be received normally, a transmission unit that transmits a signal indicating that the data has been received normally,
When data is received, a reception processing unit that extends a reception period for performing data reception processing;
When data transmitted without notice of data transmission at the Mth timing according to the predetermined period is received during the reception period, the reception period is extended and the data is normally received when the data is received normally. A signal indicating that the data has been transmitted is transmitted, and it is determined whether or not retransmission control processing has been performed based on the data transmission advance notice received in the extended reception period, and the data retransmission control processing has been performed. A control unit that performs control to transmit a signal indicating that the data has been successfully received regardless of reception of the data;
A communication apparatus comprising: A wireless communication system that performs reception processing of data transmitted at each timing arriving at a predetermined cycle in a predetermined reception period for each timing,
A first communication device having a transmission unit for transmitting data at each timing;
When the data can be received normally, a transmission unit that transmits a signal indicating that the data has been received normally,
When data is received, a reception processing unit that extends a reception period for performing data reception processing;
When data transmitted without notice of data transmission at the Mth timing according to the predetermined period is received during the reception period, the reception period is extended and the data is normally received when the data is received normally. When a signal indicating success has been transmitted, it has been determined whether or not retransmission control processing has been performed based on a data transmission advance notice received in the extended reception period, and the data retransmission control processing has been performed A control unit that performs control to transmit a signal indicating that the data has been successfully received regardless of the reception of the data, and a second communication device having:
A wireless communication system comprising: A wireless communication method,
The second communication device performs reception processing of data transmitted from the first communication device at each timing that arrives at a predetermined cycle, at a predetermined reception period for each timing,
When the data can be normally received, a signal indicating that the data has been normally received is transmitted from the second communication device to the first communication device,
When data is received, the second communication device extends a reception period for performing data reception processing,
When data transmitted without notice of data transmission at the Mth timing according to the predetermined period is received during the reception period, the reception period is extended and the data is normally received when the data is received normally. When a signal indicating success has been transmitted, it has been determined whether or not retransmission control processing has been performed based on a data transmission advance notice received in the extended reception period, and the data retransmission control processing has been performed Performs control to transmit a signal indicating that the data was successfully received regardless of the reception of the data,
A wireless communication method. A communication device,
A transmission unit that transmits data at each timing to a second communication device that performs reception processing of data transmitted at each timing that arrives at a predetermined period in a predetermined reception period at each timing;
A receiver for receiving a signal indicating that the data has been successfully received, which is transmitted from the second communication device when the data has been successfully received;
A control unit that performs retransmission control processing in accordance with a signal from the second communication device, wherein the control unit receives data transmitted without notice of data transmission at the Mth timing in accordance with the predetermined period. When the data is received, the reception period is extended, and when the data can be normally received, a signal indicating that the data has been normally received is transmitted, and the data transmission advance notice received in the extended reception period is transmitted. Whether or not retransmission control processing has been performed, and if the data retransmission control processing has been performed, a signal indicating that the data has been successfully received is transmitted regardless of reception of the data. Performing transmission control of parameters for performing control to be performed by the second communication device,
A communication device.

Images